[Stgt-devel] Seems you cannot use LUN 0 on a target ...

[FUJITA Tomonori]

On Thu, 24 Jul 2008 23:32:50 +0200
Tomasz Chmielewski <mangoo at wpkg.org> wrote:

> Richard Sharpe schrieb:
> > Hi,
> > 
> > Well, I managed to configure LUN 0 with backing store, and tried to
> > use it via iSCSI, but to no avail.
> > 
> > However, as soon as I created LUN 1, all was ok.
> > 
> > Is this a known problem? Something I am not understanding?
> 
> In doc/README.iscsi we can read:
> 
>    The controller device for management with lun 0 was created
>    automatically. You can't remove it.

Yes, you can't touch LUN0.


> What is the "controller device for management" anyway? I don't such 
> device exist with other (Linux) iSCSI target implementations, do they?

In general, you can see such special logical unit in a large
(FC, iSCSI, SAS, or whatever) storage system.

About tgt, it greatly simplifies the code.